The companies were named winners last week for the contract over the Bohorok block, covering 502,200 hectares of land at the south-eastern end of the North Sumatra basin, close to Medan.

The three companies had signed a joint study agreement for work on the block in August 2011 in conjunction with an Indonesian university, giving them priority bidding rights over the block when it was first offered by regulator BP Migas.

NZOG